Sunday

June 26, 2016
Total # Posts: 2,267

**math**

A metal worker has a metal alloy that 15% copper and another one is 70% copper. how many kilograms of each alloy should the metalworker combine to make 120kg of a 48% copper alloy?
*March 25, 2016*

**math**

A metal worker has a metal alloy that 30% copper and another one is 55% copper. how many kilograms of each alloy should the metalworker combine to make 50kg of a 50% copper alloy?
*March 25, 2016*

**Linear Algebra**

Diagonalize the matrix A = [1,1;-2,4] using a similarity transformation. Give the transformation matrices such that (C^−1)AC = D, where D is a diagonal matrix. (D, C) = ?
*March 23, 2016*

**Math**

Write a function that represents the situation. Find the balance A in the account after the given time period t. $2000 deposit that earns 5% annual interest compounded quarterly; 5 years A function is A= The balance of the account after 5 years is $_
*March 22, 2016*

**Linear Algebra**

Diagonalize the matrix A = [1,1;-2,4] using a similarity transformation. Give the transformation matrices such that (C^−1)AC = D, where D is a diagonal matrix. (D, C) = ?
*March 21, 2016*

**Linear Algebra**

Transform the matrix A=[5,−3;1,1], into a matrix B using the similarity transformation (C^−1)AC, with matrix C=[3,1;1,1]. B=(C^−1)AC = ?
*March 21, 2016*

**Math**

which shape has 5 faces 5 vertices and 8 edges? triangular Pyramid** Rectangular pyramid Pentagonal pyramid
*March 17, 2016*

**Language Arts**

No not really, its more of many opinions that seem like facts would C, or D be better
*March 15, 2016*

**Language Arts**

Excerpt from “I Am a Native of North America” by Chief Dan George Man must love fully or he will become the lowest of the animals. It is the power to love that makes him the greatest of them all . . . for he alone of all animals is capable of love. Love is something ...
*March 15, 2016*

**Social Studies**

How did improvements in transportation, communication, farming, and manufacturing affect the economy of the North? Break down your answer by providing an example of advancement in each of the four areas. Then discuss how that improvement led to changes in the North’s ...
*March 15, 2016*

**Physics**

A 313 μF defibrillator capacitor is charged to 4.94×103 V. When fired through a patients chest, it loses 95 % of its charge in 40 ms. What is the resistance of the patients chest?
*March 14, 2016*

**Language Art's**

Ms. Sue, what's wrong if the person has spelling errors.. They just need help
*March 7, 2016*

**english, check please :)**

Thank you, Reed.
*March 7, 2016*

**english, check please :)**

Sarcastic?
*March 7, 2016*

**english, check please :)**

Read this excerpt from a speech on women's rights delivered by Elizabeth Cady Stanton on July 19, 1848: We do not propose to petition the legislature to make our husbands just, generous, and courteous, to seat every man at the head of a cradle, and to clothe every woman in...
*March 7, 2016*

**Physics**

a box of mass 7 kg is pulled up a frictionless 30 degree incline by a force of 381 N which acts parallel to the incline surface. the box has an initial speed of 5m/s and is pulled 9m. what is the speed of the box at the end of the 9m.
*March 3, 2016*

**precalculus**

a plane is heading 60 degrees east of south at 180 km/hr. a 50 km/hr wind blows in the direction of 25 degrees west of south. find the resultant velocity and bearing.
*March 2, 2016*

**precalulus**

a ship travels 60 miles due east, then adjusts its course northward. after travelling 80 miles in the new direction, the ship is 139 miles from its point of departure. calculate the ship's bearing.
*March 1, 2016*

**matth**

i meant 17 for the answer, not 8
*March 1, 2016*

**matth**

first do g(0): 3-(0)2 = 3 then do f(3) since 3 was the answer to g(0): 6(3)-1 = 8
*March 1, 2016*

**Math**

The bottom of a shopping bag measures 8 inches by 10 inches. The bag has a height of 12 inches. How much paper is needed to make the bag?
*February 29, 2016*

**math**

Julia measured the high temperature in her town for one week. Using the chart below, find the mean absolute deviation for the high temperatures. Be sure to show your work for finding: graph:sunday:50 monday:56 tuesday:52 wednesday:46 thursday:48 friday:42 saturday:38
*February 27, 2016*

**math**

Thirteen bowlers were asked what their score was on their last game. The scores are shown below. 190, 150, 154, 194, 182, 190, 170, 151, 190, 170, 178, 161, 180 Find the range of the bowlers’ scores.
*February 27, 2016*

**Math**

imgurcom/TDXvnSw
*February 27, 2016*

**Math**

The line plot below represents the number of letters written to overseas pen pals by the students at Waverly Middle School. Each x represents 10 students. How many students wrote more than 6 and fewer than 20 letters?
*February 27, 2016*

**REPOSTHealth PLEASE CHECK ANSWERS**

1, 3, 4, 5, 6, and 7 are wrong. 2 is B 8 is B 9 is B 10 is C
*February 26, 2016*

**Science**

Maybe you should have learned it before you took the quiz.
*February 22, 2016*

**math**

Are all relations equations? Is there any instances where a relation is not a relation
*February 22, 2016*

**Algebra**

A projectile which is fired from the ground with a velocity of 960 ft/sec, at an angle of 30° above the ground, has a height at time t of h(t)=480t–16t2. Find the time when it hits the ground again.
*February 21, 2016*

**CHEMISTRY PLEASE HELP APPRECIATE IT LOTS!**

Thankyou thankyou so much. Making it harder than it should be.
*February 18, 2016*

**CHEMISTRY PLEASE HELP APPRECIATE IT LOTS!**

7.) How many moles of fluroine are required to react with 12 g of sodium iodide? I already balanced it but am confused to go from here F2 + 2 NAi ---- 2 NaF + I2 12 g NaI + 2 mol NAI/149.89 gNAi * 1 mol NAF/1 mol NAi * 1 mol F2 / 2 mol NaF 1.) how many grams of magnesium are ...
*February 18, 2016*

**chem**

If 15.22 g of mercury (II) oxide decompose, how many moles of oxygen can be produced?
*February 18, 2016*

**Geography**

1-B 2-D 3-A,B,C
*February 10, 2016*

**Linear Algebra**

True/False question Suppose that A is a 2 x 3 matrix such that A[1, 1, 1]^t = [2, 3]^t = A[2, 3, 4]^t. Then [1, 2, 3]^t belongs to the nullspace of A. I have no idea how to start this question/what it means.
*February 6, 2016*

**science**

please help!!
*February 4, 2016*

**science**

Some constellations, such as Ursa Minor, are visible in the sky year-round; other constellations appear for only part of the year. Explain why this happens. Please help this is my last question and it truly stumped! It'd mean the world if someone could explain this to me. ...
*February 4, 2016*

**Calc II**

Find the volume of the solid generated by rotating the region of the x-y plane between the line y=6, the curve y=3sin(x)+3 for -pi/2 < (or equal to) x < (or equal to) 5pi/2 about the line y = 6.
*February 2, 2016*

**Chemistry**

how do i figure out the moles of H2? Do I convert the mL to L and then divide that by the mass of H2?
*January 31, 2016*

**Chemistry**

Calculate the mass of Mg needed to produce ~40 mL of H2. how do I do this?
*January 31, 2016*

**Algebra 1**

A contestant on a quiz show gets 50 points for every correct answer and loses 100 points for each incorrect answer. After answering 24 questions, the contestant has 300 points. How many questions has the contestant answered correctly? Incorrectly?
*January 30, 2016*

**Mathematics**

The first three terms of a geometric sequence are: T1; T2; and T3. If T2 = T1 + 4 and T3 = T2 + 9, determine the values of T1; T2 and T3
*January 30, 2016*

**Algebra 1 - 9th Grade**

A contestant on a quiz show gets 50 points for every correct answer and loses 100 points for each incorrect answer. After answering 24 questions, the contestant has 300 points. How many questions has the contestant answered correctly? Incorrectly?
*January 29, 2016*

**Science**

Kpop is real is right! These are the answers for the What Causes Climate? quick check.
*January 29, 2016*

**English**

ugh no. I'm doing it right now I'm trying to find out 😹
*January 29, 2016*

**Calc II**

Find the function y = y(x) which solves the initial value problem: 4sec(x)*dy/dx = e^(y+sin(x)) where y(0) = -5
*January 28, 2016*

**English**

What is the secret to reaching someone with words? Which of the poems—"Concrete Mixers," "The City Is So Big," or "Harlem Night Song"—best uses words to create a vision or an idea of the city for you? In a paragraph, state your opinion ...
*January 26, 2016*

**History**

Hebrew symbol for l: symbol for pi basically Kanarda symbol for o: basically a curved w with a tail on the left Hindi : voiceless breath
*January 25, 2016*

**Algebra**

The quadratic function f is negative only on the open interval (−2, 1 4 ) and its graph passes through the point (−1, −5). Determine the coefficients of f and sketch its graph.
*January 25, 2016*

**Algebra**

The quadratic function f is negative only on the open interval (−2, 1 4 ) and its graph passes through the point (−1, −5). Determine the coefficients of f and sketch its graph.
*January 25, 2016*

**Calc II**

Write a simpler expression for z = ln(4x^4 + 11x^3) + ln(1/5x^3) which does not involve any powers on x which are bigger than 1. I have no idea how to simplify the first natural log since it has two x values with exponents.
*January 24, 2016*

**tourism, maths literacy, business studies and econ**

accounting, econ
*January 24, 2016*

**Spanish**

its A
*January 24, 2016*

**Financial Math**

Emily borrows 20,000 for 8 years at a nominal discount rate of 6% compounded quarterly. Calculate the amount of discount that Emily will pay.
*January 24, 2016*

**Financial Math**

You have $100 and could use it to buy 80 songs from itunes. Instead, you invest your $100 at an annual effective interest rate of 11.3% for 4 years. The price of songs on itunes is subject to an annual effective rate of inflation of r%. At the end of 4 years, you can buy 101 ...
*January 24, 2016*

**Algebra 2 pt 2**

I need help making a table 3. One of the fireworks is launched from the top of a 70ft tall building with an initial upward velocity of 150 ft/sec. a. What is the equation for this situation? g=-32ft/s^2 b. When will the firework land if it does not explode? 9.28 seconds c. ...
*January 22, 2016*

**Maths lit.Economics.Business.Accounting.English.Afrikaans.**

yeeeeessssssss
*January 21, 2016*

**College Calc**

A train travels from city A to city B and then to city C. The distance from A to B is 220 miles and the distance from B to C is 87.5 miles. The average speed from A to B was 55 miles per hour, and the average speed from B to C was 35 mph. What was the average speed from A to C...
*January 21, 2016*

**math**

write a translation rule that maps point D (7, -3) onto point D'(2,5)
*January 20, 2016*

**Math**

Thomas needs to cut a piece of wood for a model airplane he is builing. He has four peices of wood: 5 ft, 4 ft, 6 ft, 3 ft long. If the length of wood he needs to cut √11 ft long, which peice of wood should be cut to have the least amount of unused wood.
*January 20, 2016*

**Honors Algebra 2**

Write an equation in standard form of the parabola that has the characteristics below. Vertex at (1,-8); passing through the point (3,12) So I started the problem and now I'm stuck as of what to do next. Y=a(x-h)+k 12=a(3-1)^2-8 12=a(2)^2-8 12=4a-8 4=4a 1=a
*January 19, 2016*

**Social studies**

B, sorry
*January 19, 2016*

**physics**

Light year is a unit of time.
*January 14, 2016*

**Science**

Certain seismic waves travel as.. A) electromagnetic and transverse waves. B) visible light and longitudinal waves. C) longitudinal and transverse waves. D) compression and visible light waves. I have no idea I never learned this:(
*January 14, 2016*

**Science**

When the energy of a light wave is transferred to a particle and causes it to vibrate and generate heat, the energy of the light wave is.. A) absorbed B) reflected C) refracted D) transmitted D?
*January 14, 2016*

**Language Arts**

Oh, right. Thank you, tutor Writeacher, for answering my question. Much appreciated~
*January 13, 2016*

**Language Arts**

Any time.
*January 13, 2016*

**Language Arts**

Thank you, tutor anon, for answering my question. Much appreciated~
*January 13, 2016*

**Language Arts**

I got the word calumniation when I looked in a thesaurus.
*January 13, 2016*

**Language Arts**

What is it the word (I think verb) when someone bluffs to make a story more interesting or believable? Thank you, tutors, for sparing your time to review my question.
*January 13, 2016*

**PHYSICS 1**

The vector signs are above each letter (I just don't know how to show it that way) A= 145 units @ 190 deg. B= 75 units @ 288 deg. C= 210 units @ 85 deg. D= 105 units @ 355 deg. How do I use the component Method with these given magnitude and degree??? Physics Component ...
*January 12, 2016*

**Algebra 2**

Changing my mind. It is D.
*January 12, 2016*

**Algebra 2**

A function is created to represent the amount of money in your checking account. What restrictions would be made to the domain? -The domain would include all real numbers.* -The domain would only include positive integers. -The domain would only include positive numbers. -The ...
*January 12, 2016*

**Social studies**

B C A 100%
*January 12, 2016*

**Algebra 2**

Thank you! You were correct!
*January 12, 2016*

**Algebra 2**

Perry can fill a sorter with oranges from the conveyer belt in 10 minutes. While Perry fills the sorter, Gillian takes oranges out of the sorter and puts them in shipping crates. With Gillian taking oranges out of the sorter, it takes 25 minutes for Perry to fill the sorter. ...
*January 12, 2016*

**STILL CONFUSED Physics Component Method**

Mr. Steve, could you do an example using A. for me. I am still confused as to how you actualy plug in the numbers. I am also confused on sine and cosine and tan.. Please show step by step. That'll help A lot!
*January 12, 2016*

**Physics Component Method**

The vector signs are above each letter (I just don't know how to show it that way) A= 145 units @ 190 deg. B= 75 units @ 288 deg. C= 210 units @ 85 deg. D= 105 units @ 355 deg. How do I use the component Method with these given magnitude and degree???
*January 12, 2016*

**physics**

1. A 12 kg wagon is being pulled at an angle of 38o above horizontal. What force is applied to the wagon if it accelerates from rest to a speed of 2.2 m/s over a distance of 3.4 m? (4 marks) 2. A 31.0 kg child on a swing reaches a maximum height of 1.92 m above their rest ...
*January 9, 2016*

**English I**

Which sentence is correct? The teacher: told the child's mother "Please be sure to dress Jackie warmly tomorrow." The teacher told the child's mother: "Please be sure to dress Jackie warmly tomorrow." The teacher told the child's mother "...
*January 8, 2016*

**Math**

If the markup is %50 and the selling price is $300, what is the initial price? Given answers: A $150 B $200 C $350 D $400 I asked help from my mother and she said the answer was A, $150, although from the formula R = C / ( 1 - G) (to calculate revenue R based on the cost C and...
*January 7, 2016*

**Algebra**

Thank you, tutor, Ms. Sue, for reviewing my problem, and questions! Also for helping me with my problem.
*January 6, 2016*

**Algebra**

Please help me with this problem, I'm not entirely sure on what to do to solve it. Thank you, tutors. The weight of an object is related to its length by the equation: weight (in pounds) = 3L^3 (in feet). If the object is 6 feet tall, what is its weight? Given answers: A 6...
*January 6, 2016*

**Health**

100% using B C C D A thank you!
*January 6, 2016*

**physics **

Two cyclists start out on the same trail together that is overall 20km long. The first cyclist completes the entire trail and is traveling at a constant 20 km/hr for the away part of the trip and then only 15 km/hr for the return trip. the Second cyclist, who is slower, is ...
*December 23, 2015*

**physics **

Question 1) A rock is dropped from the top of a 100 meter tall cliff. A. ) How long will it take for the rock to reach the ground. B) What will be the velocity of the rock when it hits the ground? C) How long will it take for the rock to reach the ground if the rock is thrown ...
*December 23, 2015*

**physics**

1. A car travels from one point to another point that is 4km to the east of its original position and then back to its original position in 22 minutes. What will be the car's average speed? What will be the car's average velocity? 3.) A truck is moving with a velocity ...
*December 22, 2015*

**physics**

Thankyou so much Damon! I just confused where to put what numbers and what Equation to use. Also to clarify: Constant Speed is always = V1 Average Speed is V2= Also how do you know when to use -9.8 m/s/s as constant acceleration and not 9.8 and also using 4.9 or -4.9 m/s/s?
*December 20, 2015*

**Physics**

Two springs are set up on a table. The longer spring has a spring constant of 221 N/m and an initial length of 44.0cm. The shorter spring has a spring constant of 725 N/m and an initial length of 22.0cm. How far above the table is an 9.30kg ball when it reaches its equilibrium...
*December 17, 2015*

**math please help i'm new**

Thanks!
*December 16, 2015*

**math please help i'm new**

What is the diagonal of a 9 in x 12 in rectangle?
*December 16, 2015*

**Algebra**

Which of the following describes a correct method for solving the equation below? -7/2n + 5 = -16 1. add 5 to both sides, then divide both sides by 2/7 2. subtract 5 from both sides, then multiply both sides by -7/2 3. add -5 to both sides, then multiply both sides by -2/7 4. ...
*December 15, 2015*

**Chemistry**

Compute the number of molecules of water driven off when 12.05g of sodium acetate trihydrate is heated.
*December 12, 2015*

**Social Studies**

Thank you tutor Reed for reviewing the questions and checking my answers. Sorry for late reply, decided to work on more questions, but I got distracted with other work. For #1, it wouldn't be easy to find out where somebody lived before houses and businesses had street ...
*December 12, 2015*

**Social Studies**

I think for #3 it's not only economic, but maybe social?
*December 12, 2015*

**Social Studies**

Please check the 6 questions with my answers. Thank you. Social Political Economic? For each of the following statements, determine whether the statement is Social, Political, and/or Economic in nature. Some statements can be two or more types. 1. "The federal government ...
*December 12, 2015*

**Social Studies**

"influenced [the sugar plantations] toward the end of the nineteenth century in Hawaii". Sorry I forgot to add that.
*December 12, 2015*

**Social Studies**

Thank you tutor Reed for checking my question and work out. It's not a surprise you don't know who Aaron Stern is, for all I know he's just a tutor that reviewed my questions and answer. The agents are the sugar middlemen like Hackfeld, one of the members Big 5 ...
*December 12, 2015*

**Social Studies**

Thank you tutor Aaron for checking my work! I still have a lot of questions that I need to work on, so just this question won't be enough. The exam is 80 points, so I really want to know if my answers are correct, each question is 2 points. I don't want to be going in ...
*December 12, 2015*